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International
Tables for Crystallography Volume G Definition and exchange of crystallographic data Edited by J. R. Hester and B. McMahon © International Union of Crystallography 2026 |
International Tables for Crystallography (2026). Vol. G. Early view chapter
https://doi.org/10.1107/97809553602060001011 Chapter 4.2 Core dictionary (coreCIF) |
Core dictionary version 3.3.0
_refln.sin_theta_over_lambda
Name:_refln.sin_theta_over_lambda
Aliases:
_refln_sint/lambda
_refln_sin_theta_over_lambda
_refln.sint_over_lambda
Definition:
The (sin θ)/λ value for this reflection.
Type: Real
Units: reciprocal_angstroms
The permitted range is 0.0 → infinity
Evaluation method:
With r as refln
h = r.hkl
G = _cell.reciprocal_metric_tensor
r.sin_theta_over_lambda = Sqrt ( h * G * h ) / 2.
Category:
refln
